Improved blow-pipe



JOSIAH MGFARLAND, OF CLINTON, ILLINOIS.

IMPRovED BLOW-PIPE.

Specificationformng part of Letters Patent No. 58,118, dated September 18, 1866. i

lbV all whom it may concern.-

Be it known that I, JOSIAH MOFARLAND,

of Clinton, in the county of De Witt and StateV of Illinois, have invented a new and useful Improvement in Blow-Pipes; and Ido hereby declare that the following is a full, clear., and exact ldescription thereof, which will enable others skilled in the artto make and use the same, reference being had to the accompanying drawings, forming part of this specilication, in which- Figure l is an elevation of the apparatus made according to myinvention, the pump being shown in section. Fig. 2 is a plan.

This invention consists in applying an airchamber strong enough to resist from one hundred to ve hundred atmospheres to a forcepump,and to aileXible pipe with aue-pointed mouthpiece, in such a way that by means of the pump the chamber is iilled with compressed air or gas of any character, when, by closing suitable cocks, the same can be confined and retained therein, and the air-chamber taken off and carried to the place where the blow-pipeis to be used, and by the action of the air or gas a powerful blast obtained without the labor or agency of the operator. This blow pipe is especially useful for all workers in gold, silver, platinum, and other metals, for soldering, bracing, and combining dili'erent metals that require a high heat.

A is ametallic receiver, formed like a sphere. O is a pipe which connects it to the forcepump O. In this pipe is a gage, B, which will show the 'amount et' pressure in the receiver.

H is a- [iexible tube mounted at its free end` with atnemouth-piece, and at the place of its attachment with the receiver is a stop-cock, G, by which the -air or gas is kept from entering the tube. a is the eductiou-vavle of the pump, placed at the junction of the pump with pipe O. y

4 The piston of the pump is hollow7 and its inner end has a valve, b, opening outwardly. That part of the piston-rod which is outside of the pump-cylinder is made capable of being connected toa gas-pipeby a screwconnection, ifit is desired to supply the pump with gas in lieu of air, instead of being connected, as here shown, to the rack D. The air to supply the pump enters the piston at c.

The rack D is made to slide in proper ways made for it on the same platform that supports the pump, and it is moved by a lever, K, at whose short end is aquadrant-pinion, J.

By working the lever a few minutes I can charge the receiver with sufficient air tosupply a com mou blow-pipe from one to two hours.

The pipe O has a stop-cock, and this pipe is also made to unscrew atf, so that the receiver can be detached from the pump after it has been charged. The cock Gris closed when the air or gas is forced in, and when filled the cock F is closed. The discharge of air or gas through the mouth-piece will be regulated by the cock G.

The whole apparatus can be att-ached to a work-table or bench by screws.

I claim as new and desire to secure by Letters Patentln blo\v-pipes, a detachable air-chamber, A, in combination with the flexible tube having a suitable mouth-piece for directing the cnr rent of air or ga's and a force-pump, all coustructed` and operated substantially as described.

JOSIAH MCFARLAND. Witnesses:

-J oHN J. MCGRAW,

WM. H. STOREY. 

